From: "Pascal J. Bourguignon" <pjb@informatimago.com>
To: help-gnu-emacs@gnu.org
Subject: Re: How to iterate over properties in a plist?
Date: Sat, 01 Aug 2015 01:34:55 +0200 [thread overview]
Message-ID: <87y4hvvr34.fsf@kuiper.lan.informatimago.com> (raw)
In-Reply-To: mailman.7702.1438378982.904.help-gnu-emacs@gnu.org
Marcin Borkowski <mbork@mbork.pl> writes:
> Hi all,
>
> I need to iterate over all properties in a plist. Obviously, mapcar (or
> mapc, since I need side effects only) is of no use for me. I can easily
> write a plist-mapc function:
>
> (defun plist-mapc (function plist)
> "Iterate FUNCTION (a two-argument function) over PLIST. Error
> checking is for weenies."
> (when plist
> (funcall function (car plist) (cadr plist))
> (plist-mapc function (cddr plist))))
>
> but maybe it's there already?
There's:
(loop for (k v) on p-list by (function cddr)
do (something-with :key k :value v))
But you might still want to abstrat it away in a map-plist function.
--
__Pascal Bourguignon__ http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk
next parent reply other threads:[~2015-07-31 23:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.7702.1438378982.904.help-gnu-emacs@gnu.org>
2015-07-31 23:34 ` Pascal J. Bourguignon [this message]
2015-07-31 21:42 How to iterate over properties in a plist? Marcin Borkowski
2015-07-31 22:18 ` Stefan Monnier
2015-07-31 22:29 ` Marcin Borkowski
2015-07-31 22:42 ` Dmitry Gutov
2015-08-01 13:34 ` Michael Heerdegen
[not found] ` <mailman.7705.1438381807.904.help-gnu-emacs@gnu.org>
2015-07-31 23:33 ` Pascal J. Bourguignon
2015-08-01 22:49 ` Stefan Monnier
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